.leftbox{
    float:left;
    width: 16%;
    height:500px;
    background-color: #002140;
    padding:20px ;
    box-sizing: border-box;
}
.leftbox div{
    margin-top: 30px;
    border-bottom: 2px solid #FFFFFF;
}
.leftbox1{
    text-align: center;
    width:150px;
    height: 40px;
}
.leftbox a{
    color: white;
    font-size: 18px;
    font-weight: 100;
    text-decoration:none
}
.leftbox1 a svg{
    width: 20px;
    height: 20px;
}
.leftbox1:hover{
    font-size: 25px;
}
.mainBox{
    width: 80%;
    height: 500px;
    float: left;
    background-color: #FFFFFF;
    box-shadow: 10px 10px 5px #888888;
}
#title,#desc,#s_t,#e_t{
    width: 251px;
    height: 32px;
    border: 1.5px solid  #003140;
    border-radius: 8px;
}
.rightBox{
    width: 10%;
    float: right;
}
.rightBox img{
    width: 160px;
    position:absolute;
    bottom:25px;
    right:20px
}
.btn_sub{
    width: 80px;
    height: 40px;
    background-color:  #003f52;
    border: 1px solid  #003f52;
    border-radius: 5px;
    padding-left: 10px ;
    color:white;
    font-family: 宋体;
}
.btn_sub:hover{
    filter: brightness(1.1);
}